According to HuffPost UK blogger and older female model Alex B, these cases only further highlight the need for greater diversity among female models.

"The point that Elliott Sailors and Casey Legler are making is that as male models they can model at an age when female models are regarded as old," she told HuffPost UK Lifestyle.

"I love their inventiveness and the individualistic solution found to this conundrum but the point remains that we need to see more older women on the catwalk without expecting female models to turn into male models to ensure greater longevity to their career."

"Androgyny is perfectly acceptable but does not necessarily open the door to diversity," she warns.